Agilent Technologies 7697A Advanced Operation Manual page 32

3
Method Development
32
Controlling the phase ratio
Another factor to manipulate to increase sensitivity is the
phase ratio, V /V . Recall the vapor phase concentration
G L
equation:
C
O
C =
G
V
G
K +
V
L
Where K is small, reducing the phase ratio will produce a
higher concentration of analyte in the headspace volume.
The 7697A can use a variety of sample vials. Select a sample
vial and sample amount to create a higher concentration of
analyte.
Where K is large, reducing the phase ratio results in less
gain.
Advanced Operation